Out of curiosity, of the archetype combinations available for bards, are there any audience favorites or archetypes that just seem to synergize well together?

Soundstriker + Magician is the ultimate blaster bard combo.

Magician lets you buff both ally spellcasters as well as yourself and Soundstriker allows performances to be used for consistent damage output.

Add in the fact that you can use Spellsong to both Wordstrike (or the very powerful Weird Word at level 6) and cast a spell on the same turn AND can use Harmonic Spell to continue playing your other performances for nearly forever using cantrips easily overcomes the weapon and bardic knowledge abilities that you loose in return.